LG KS660 hard reset
Type 1809#*660# This will take you to service menu. Select Factory Reset.Select Menu > Settings > Reset settings - Reset all the settings to their factory definitions.
If your KS660 frozen, try to restart your phone, take out and reinsert battery.
You can use LG Mobile Support tool LG PCSuite 4.G.2.148.090731 to repair some LG cell phone model, after download select menu Customer Support > Recovery Phone
If you know LG KS660 hard reset with buttons / keys pls leave comment.